. >> when you're in union station and you come down the escalator and there's a few police there with guns slung over and -- i hate that. >> gun store owners say the protest probably won't make a difference. in fact, the stores have seen an increase in sales because many fear stricter regulations in light of the newtown school shooting. >>> all right. let's go to melissa mollet with breaking news at the live desk. >> brand new surveillance video we got from new york police. this is just into the newsroom. take a look. video of the woman police say pushed a man to his death in front of a subway train in new york thursday night. it is a bit hard to sigh. but it shows the woman running from the platform in queens. witnesses say she had been following the man closely and mumbling to herself and then shoved him as the train pulled into the platform. the second time this month, someone has been shoved to their death on subway tracks. she's described as heavy-set and in her 20s. at the live desk, melissa mollet, news 4. >>> more breaking news. russia's president, vladimir putin signed a cont